Further Advance versus Re-mortgage- Pros/cons?

jellyfish76

Hello All.

I currently have a mortgage on a 36% share (of a shared ownership flat) and am in the process of trying to purchase the remaining 64%)

My valuation is done and I understand the the stair-casing process.

My questions is what are the pros/cons of buying with a further advance with my existing lender over remortgaging with a new lender.

I understand that staying with my existing lender may be easier and that I could avoid some of the fees involved in a remortgage elsewhere.

In the longer-term, what are the disadvantages of using a further advance over moving elsewhere to remortgage?

Thanks in advance,
JF